target/linux/generic/pending-4.14/220-optimize_inlining.patch

   1 --- a/arch/arm/include/asm/hardirq.h
   2 +++ b/arch/arm/include/asm/hardirq.h
   3 @@ -6,6 +6,7 @@
   4  #include <linux/threads.h>
   5  #include <asm/irq.h>
   6
   7 +/* number of IPIS _not_ including IPI_CPU_BACKTRACE */
   8  #define NR_IPI 7
   9
  10  typedef struct {
  11 --- a/arch/arm/kernel/atags.h
  12 +++ b/arch/arm/kernel/atags.h
  13 @@ -5,7 +5,7 @@ void convert_to_tag_list(struct tag *tag
  14  const struct machine_desc *setup_machine_tags(phys_addr_t __atags_pointer,
  15         unsigned int machine_nr);
  16  #else
  17 -static inline const struct machine_desc *
  18 +static inline const struct machine_desc * __init __noreturn
  19  setup_machine_tags(phys_addr_t __atags_pointer, unsigned int machine_nr)
  20  {
  21         early_print("no ATAGS support: can't continue\n");
  22 --- a/arch/arm/kernel/smp.c
  23 +++ b/arch/arm/kernel/smp.c
  24 @@ -76,6 +76,10 @@ enum ipi_msg_type {
  25         IPI_CPU_STOP,
  26         IPI_IRQ_WORK,
  27         IPI_COMPLETION,
  28 +       /*
  29 +        * CPU_BACKTRACE is special and not included in NR_IPI
  30 +        * or tracable with trace_ipi_*
  31 +        */
  32         IPI_CPU_BACKTRACE,
  33         /*
  34          * SGI8-15 can be reserved by secure firmware, and thus may
  35 @@ -801,7 +805,7 @@ core_initcall(register_cpufreq_notifier)
  36
  37  static void raise_nmi(cpumask_t *mask)
  38  {
  39 -       smp_cross_call(mask, IPI_CPU_BACKTRACE);
  40 +       __smp_cross_call(mask, IPI_CPU_BACKTRACE);
  41  }
  42
  43  void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
  44 --- a/arch/arm64/include/asm/cpufeature.h
  45 +++ b/arch/arm64/include/asm/cpufeature.h
  46 @@ -125,7 +125,7 @@ static inline bool cpu_have_feature(unsi
  47  }
  48
  49  /* System capability check for constant caps */
  50 -static inline bool __cpus_have_const_cap(int num)
  51 +static __always_inline bool __cpus_have_const_cap(int num)
  52  {
  53         if (num >= ARM64_NCAPS)
  54                 return false;
  55 @@ -139,7 +139,7 @@ static inline bool cpus_have_cap(unsigne
  56         return test_bit(num, cpu_hwcaps);
  57  }
  58
  59 -static inline bool cpus_have_const_cap(int num)
  60 +static __always_inline bool cpus_have_const_cap(int num)
  61  {
  62         if (static_branch_likely(&arm64_const_caps_ready))
  63                 return __cpus_have_const_cap(num);
  64 --- a/arch/mips/include/asm/bitops.h
  65 +++ b/arch/mips/include/asm/bitops.h
  66 @@ -462,7 +462,7 @@ static inline void __clear_bit_unlock(un
  67   * Return the bit position (0..63) of the most significant 1 bit in a word
  68   * Returns -1 if no 1 bit exists
  69   */
  70 -static inline unsigned long __fls(unsigned long word)
  71 +static __always_inline unsigned long __fls(unsigned long word)
  72  {
  73         int num;
  74
  75 @@ -528,7 +528,7 @@ static inline unsigned long __fls(unsign
  76   * Returns 0..SZLONG-1
  77   * Undefined if no bit exists, so code should check against 0 first.
  78   */
  79 -static inline unsigned long __ffs(unsigned long word)
  80 +static __always_inline unsigned long __ffs(unsigned long word)
  81  {
  82         return __fls(word & -word);
  83  }
  84 --- a/arch/mips/kernel/cpu-bugs64.c
  85 +++ b/arch/mips/kernel/cpu-bugs64.c
  86 @@ -42,8 +42,8 @@ static inline void align_mod(const int a
  87                 : GCC_IMM_ASM() (align), GCC_IMM_ASM() (mod));
  88  }
  89
  90 -static inline void mult_sh_align_mod(long *v1, long *v2, long *w,
  91 -                                    const int align, const int mod)
  92 +static __always_inline void mult_sh_align_mod(long *v1, long *v2, long *w,
  93 +                                             const int align, const int mod)
  94  {
  95         unsigned long flags;
  96         int m1, m2;
  97 --- a/arch/powerpc/kernel/prom_init.c
  98 +++ b/arch/powerpc/kernel/prom_init.c
  99 @@ -474,14 +474,14 @@ static int __init prom_next_node(phandle
 100         }
 101  }
 102
 103 -static inline int prom_getprop(phandle node, const char *pname,
 104 -                              void *value, size_t valuelen)
 105 +static inline int __init prom_getprop(phandle node, const char *pname,
 106 +                                     void *value, size_t valuelen)
 107  {
 108         return call_prom("getprop", 4, 1, node, ADDR(pname),
 109                          (u32)(unsigned long) value, (u32) valuelen);
 110  }
 111
 112 -static inline int prom_getproplen(phandle node, const char *pname)
 113 +static inline int __init prom_getproplen(phandle node, const char *pname)
 114  {
 115         return call_prom("getproplen", 2, 1, node, ADDR(pname));
 116  }
 117 --- a/arch/s390/include/asm/cpacf.h
 118 +++ b/arch/s390/include/asm/cpacf.h
 119 @@ -184,7 +184,7 @@ static inline int __cpacf_check_opcode(u
 120         }
 121  }
 122
 123 -static inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 124 +static __always_inline int cpacf_query(unsigned int opcode, cpacf_mask_t *mask)
 125  {
 126         if (__cpacf_check_opcode(opcode)) {
 127                 __cpacf_query(opcode, mask);
 128 --- a/arch/x86/Kconfig.debug
 129 +++ b/arch/x86/Kconfig.debug
 130 @@ -284,20 +284,6 @@ config CPA_DEBUG
 131         ---help---
 132           Do change_page_attr() self-tests every 30 seconds.
 133
 134 -config OPTIMIZE_INLINING
 135 -       bool "Allow gcc to uninline functions marked 'inline'"
 136 -       ---help---
 137 -         This option determines if the kernel forces gcc to inline the functions
 138 -         developers have marked 'inline'. Doing so takes away freedom from gcc to
 139 -         do what it thinks is best, which is desirable for the gcc 3.x series of
 140 -         compilers. The gcc 4.x series have a rewritten inlining algorithm and
 141 -         enabling this option will generate a smaller kernel there. Hopefully
 142 -         this algorithm is so good that allowing gcc 4.x and above to make the
 143 -         decision will become the default in the future. Until then this option
 144 -         is there to test gcc for this.
 145 -
 146 -         If unsure, say N.
 147 -
 148  config DEBUG_ENTRY
 149         bool "Debug low-level entry code"
 150         depends on DEBUG_KERNEL
 151 --- a/lib/Kconfig.debug
 152 +++ b/lib/Kconfig.debug
 153 @@ -305,6 +305,20 @@ config HEADERS_CHECK
 154           exported to $(INSTALL_HDR_PATH) (usually 'usr/include' in
 155           your build tree), to make sure they're suitable.
 156
 157 +config OPTIMIZE_INLINING
 158 +       bool "Allow compiler to uninline functions marked 'inline'"
 159 +       help
 160 +         This option determines if the kernel forces gcc to inline the functions
 161 +         developers have marked 'inline'. Doing so takes away freedom from gcc to
 162 +         do what it thinks is best, which is desirable for the gcc 3.x series of
 163 +         compilers. The gcc 4.x series have a rewritten inlining algorithm and
 164 +         enabling this option will generate a smaller kernel there. Hopefully
 165 +         this algorithm is so good that allowing gcc 4.x and above to make the
 166 +         decision will become the default in the future. Until then this option
 167 +         is there to test gcc for this.
 168 +
 169 +         If unsure, say N.
 170 +
 171  config DEBUG_SECTION_MISMATCH
 172         bool "Enable full Section mismatch analysis"
 173         help
 174 --- a/arch/x86/Kconfig
 175 +++ b/arch/x86/Kconfig
 176 @@ -296,9 +296,6 @@ config ZONE_DMA32
 177  config AUDIT_ARCH
 178         def_bool y if X86_64
 179
 180 -config ARCH_SUPPORTS_OPTIMIZED_INLINING
 181 -       def_bool y
 182 -
 183  config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 184         def_bool y
 185
 186 --- a/include/linux/compiler-gcc.h
 187 +++ b/include/linux/compiler-gcc.h
 188 @@ -90,8 +90,7 @@
 189   * of extern inline functions at link time.
 190   * A lot of inline functions can cause havoc with function tracing.
 191   */
 192 -#if !defined(CONFIG_ARCH_SUPPORTS_OPTIMIZED_INLINING) ||               \
 193 -    !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
 194 +#if !defined(CONFIG_OPTIMIZE_INLINING) || (__GNUC__ < 4)
 195  #define inline \
 196         inline __attribute__((always_inline, unused)) notrace __gnu_inline
 197  #else